George n



(No Model.)

G. N. CLEMSON.

SAW. v No. 417,404. Patented Dec. 17, 1889.

IN VENTOR: %i%mmm/z BY fi Armmeys.

UNITE STATES PATENT OFFICE.

GEORGE N. CLEMSON, OF MIDDLETOXVN, NEW" YORK.

SAW.

SPECIFICATION forming part of Letters Patent No. 417,404, dated December 1'7, 1889.

Application filed June 21, 1889. Serial No. 316,039. (No model.)

To aZZ whom it may concern.-

Be it known that I, GEORGE N. CLEMSON, of Middletown, in the county of Orange and State of New York, have invented new and useful Improvements in Saws, of which the following is a specification, reference being had to the annexed drawing, forming a part thereof, in which the figure isa side elevation of my improved saw.

The object of my invention is to provide a saw which may be retained firmly in its frame, so that it will not move upon the fastening screws or pins.

My invention consists in a saw provided at opposite ends with tapering apertures for receiving the fastening screws or pins, the said apertures being oppositely arranged with respect to each other, the wider part of the aperture being adapted to receive a screw or pin of suitable size, the narrower part of the aperture being narrower than the diameter of the smallest screw or pin that is used for retaining saws, so that when the saw is placed in the frame and tightened the screw or pin will be clamped on diametrically-opposite sides in the tapering aperture.

My invention is designed more particularly for application to hack-saws; but I do not limit or confine myself to this use, as it may be applied to bucksaws, whipsaws, and butchers saws.

The saw A is provided with teeth upon one edge, and in opposite ends of the saw-blade are made oblong tapering apertures a, of approximately oval form, the narrower ends of the apertures extending toward the extremities of the saw. When the saw is placed in the saw-frame, screws or rivets are inserted in the apertures a in the usual Way, and the narrower partof each aperture is of less diameter than the screw or pin inserted in the aperture, so that when the saw is strained the screw or pin will be tightly clamped in the aperture, thus preventing the saw from moving on the pin.

Havingthus described my invention, I claim as new and desire to secure by Letters Patent- A saw-blade formed with oblong tapering apertures a at its ends, said apertures being rounded at both ends and free from angles, with their smaller ends toward the ends of the blade, substantiallyas set forth.

GEORGE N CLEMSON. \Vitnesses:

F. B. I-IATHAWAY, WM. D. BROWN. 

